Core for molds



Marek 7, 1933 w UNDERWOQD 1,900,372

y" CORE FOR MOLDS `Original Filled Deo. 14, 1927 www " www Patented Mar. 7, 1933 Unirse STA-ms PATENT WESTERN UNDERWOOD, OF SANTA MONICA, CALIFORNIA, ASSIGNO'R 'ITO LA LUX MANU- FACTURING COMPANY, OF LOSYANGELES, CALIFORNIA, Ai

FORNIA coR-roRA'rroNl or GALI- GORE ron M oLns.

v Original application filed December14,1927, Serial: No. 239,915. Dividedkv andl this'. apppl'imztion illedMarch 22, 1930. Serial N0..437,995.

This Ainvention has to, do with an. insert. for a mold and has particular reference to an insert for a postor column mold.

Elongated monolithic or cementitious objects, such, for example,ascolumns orzpo'sts, are usually cast or formed in suitable molds andfin accordance withy various processes of' manufacture the molds are operated in various4 Waysy to obtain the desired packing of the material. In certain cases, f`or instance, in the case ofa post to be used in a lighting standard or electrolier, itis desirable to pro-y vide a longitudinal opening'V through rthe cast body and it is ordinarilygnecessary to' provide almetal reinforcing structure in the cast body. In practice' dificulty has been experienced in obtainingl the desired opening through a post or column and also in form? ing a post proper conditions of strain and, in the proper position in the cast body.y y 1 .y

This application is filed asa division of my cofpending application entitled: Insert for molds, `Serial Number 239,915,y led. December 14, 1927. 7 f

It is an object of thisinvention to pro.- vide an ,insert for ,a mold, for instance,.a post mold, whereby the Vdesired opening is cast or formed accurately in the finished*V product.

Another object of this invention is to provideA an improved', simple, and practical form ofy core and' core carrier for usevin connection With a post mold, orthe like.

The various. objects andl features` of this inventionwill be best and moreV fullyiunderstood from the following detailed descrip# tionof a typical form and applicationjofthe invention, throughout which f description referenceis had to the accompanying drawing, in which: n v

Fig. 1 is a longitudinaldetailed. sectional view ofy a` post mold showing the insert provided by this inventionfin placey therein. Fig.. 2l is a vi'evv of the base endf portion of the insert shown independent' of the mold. Fig. 3' isa view taken as indicated by4 line 3,-3 on Fig. 2 showing the formation vof .ther core carrier providedby my invention.,v lli'g..

Il is an enlarged transverse sectional View,

kor shapedto give the `ternal configuration.

With a metal reinforcement under 'openingfArinthe, body,

` 15 for arrangement taken, as'indicatedfk by liney 1 -leon Fig. 1,4 K beingV a viewvshowing in. detail the. spacer provided by my, invention, and. Fig.; 5. is a,

sectional vievvtaken as indicatedV byline 5,'-'-5 on Fig. i The insert or core, provided. by this inventionl is intended primarily for use Iin a mold, surcl`i for instance, as a .postl mold, 'or the like. For purpose of example II will refer to the, core, as applied to a post moldofy the c onstruction'set forth and claimed in Patent Number 1,700,522, entitled Mold construe.-y tion, issued toA me'lanuary 29,1929: This particular-mold includes i tional body, 1.0 having an opening A; designed post thefdesired exy H The body` V1() isfdifferent at its tvvo ends, onieJ ,end being, com.- paratively large to` formthe'base portionfof.

)the post, `theother end being small and adapted tol form the head end. of the post.V n v n Y 1.0, is. closed byr aJ cover plate 11 over Which-isapplied amount? f The head end ofthe body ingplate 12,@While the base end of -tliefbody is closed by the. core, carrier 12? vprovided by his inf.- ntion and a. mountingv plate 13 a'p lied Kover the core carrier.

, he insert provided to go into themfold. includes generally,`van, elongated core 121110 be arranged longitudinally Ythrough Hthe 4 the coref carrier which lis applied' to the base end yof the body an elongated secand supports the .core 111,y areinforcement y in. `thenspace A to be cast in tlfi'e post and' a spacer 16, operableto definitely space the reinforcement in` the post. The core l the general, subject matter to Whichthis application is directed",` the` reinforcementfl anld.' spacer 1'6, beingl set forthV .and claimed in my co-pending application,entitled Insert.

for mold, Serial Number 239,915., filed De'- cember 14, 1.927'.

The core'll. isshaped and proportioned to form the desiredopening inthe cast Astrueture or post, ,and in the caseof' a post for the usual, form ofliglnaing` standard', the core 111 and core carrier. 12,a are,

is provided with` anenlarged base, part, 2Q

which forms a comparatively large chamber in the base portion of the post, 'and an elonico y gated body part 21 which is slightly tapered and extends from the base part 2O to the head end of the mold. The body part 21 of the core has its large end adjoining the base 2O and the base is provided with a taper or draft allowing the core to be withdrawn from the molded post from the base end. In the preferred construction the core is formed of metal, for instance, sheet metal, and in this case the core parts are hollow. In accordance with my invention, a plug 22 closes the small or outer end portion ofthe core body 21 as shown in the drawing. The

plug is preferably somewhat removed'from` the end of the body so that a socket B is formed in the end of the core body to receive a guide part on the mold cover l1 and/or various tools or devices as set forth in the above-.mentioned patent granted to me e on mold construction. The plug is fixed in the core body so that it can be engaged in driving or forcing the core out of the casting. In Fig. 1 of the drawing the core is shown in'position where a projection on the cover 11 extends into the socket B to hold the core body in positionin the opening A. f The core carrier 122L provided by this 'invention is preferably in the form 'of a flat plate adapted to be attached to the base endv of the mold body 10, as shown in Fig. 1. The carrier 12a is adapted to be mounted in a definite position on'the base'through bolts 25, or the like.

j In accordance with this invention the base portion 2O of the core is n attached to the carrier 12,preferably permanently attached. My invention provides one or more openings 26 in the core carrying plate 12a through which the material'to be 'cast can'be filled into the mold. In the drawing I have shown a construction wherein there are several openings 26 which communicate with the opening A in the body of the mold when the core carrier 12 is in place, as shown in Fig. 1. Further, the opening or openings 26 in the Vcore carrier are located to be 'closed by the mounting plate 13 upon the mounting rplate being arranged in place,.as shown in Fig. V1.

The core structure provided by my iny vention is not only a particularly simple and inexpensive structure, but is also very convenient to handle.' It is to be noted that the core, when in place, is effectively supported at both ends so that it is positively held in predetermined position in the space A in the mold body. Further,"as above pointed out, my construction allows the mold to be filled with the core set in position and permits of the core being withdrawn from the cast body without disturbing the casting ,in themold body 10. l i

The reinforcement 15 provided by my invention includes', generally, a plurality of longitudinal rods 28, foot brackets 29 on the lower' or base ends of the rods, and one or l gether so that they stood that the number and weight of bars will depend upon the character of reinforcement desired. The foot brackets 29 are fixed, for instance, welded, or otherwise positively secured to the base ends of the rods 28, and are formed to have projecting parts 31 adapted to be attached to the base end of the mold body l0. The upperl or head ends of the bars 28 preferably project from the finished post and therefore are proportioned to project .into suitable sockets or openings provided in the cover plate 11 of the mold body. My construction is such that the head endsl of the rods' 28 `do not have to be made tight in the cover 11 of thel mold, in fact, it is preferred that they be allowed to extend freely into the openings ofthe cover 11 so VJthat the cover merely operates to space them apart and not hold them longitudinally. The

transverse tie or ties 30 may be in the natureV of wires wound around the several rods 28 in a manner such as I have illustrated in the drawing. The tie 30, when properly applied to the rods 28, ties them in or tohave little or no tendency to expand or move out radially in the event the mold structure in which the reinforcement-is spaced is rotated in the course of manufacture of the post.

The spacer 16 provided by my invention is in the nature of aring or annular member roo adapted to engage the several rods 28 and f to surround the body 21 of the core so that it operates to definitely hold and space the rods 28 with reference to the core and therefore inthe space A of the mold body 10. My invention provides a ring 32 adapted to fit around the core body 21 with substantial clearance and made comparatively narrow or thin so that it occupies comparatively little space ina radial direction in the mold space A. In accordance with my invention the ring 32 is provided with a plurality of inwardly extending lugs 33 adapted to engage the core body 21 so that the ring 32 is definitely, for instance, concen'trically, re-

lated tovr the core body. Further, my inven-.

bars 28 of the 1 sired number of spacing rings may be provided as circumstances may require.

From the foregoing description it will be j apparent that my invention provides a structureor combination of parts for insertion of a mold body whereby the cast structure is cored to have an opening in a definite position, and whereby a suitable reinforcing structure is embodied in the casting in a definite position without requiring' tensioning or other straining,such as is liable to interfere with the proper bond between the reinforcement and cast material.

Having described only a typical preferred form of my invention, I do not wish to limit myself to the specific details set forth, but

wish to reserve to myself any changes or variations that may appear to those skilled in the art or fall within the scope of the following claims. Y

Having described my invention, I claim: l. In combination, a tubular'rotary post mold, an insert for the mold including a plate for attachment to one end of the mold,

and a unitary tubular core fixed'to the plate to project through the mold to itsother end, the plate projecting radially beyond the core to Contact with an end of the mold and having an opening. in the projecting part to admit material into the mold and a mounting member to connect said end of the'mold with a rotating device, said member closing said opening.

2. In combination, a rotary post mold having a guide part at one end, an insert for the mold including, a plate for attachment to one end of the mold, a unitary tubular Y core fixed to the plate to project through the mold to its other end, and a plug in the core and spaced from the end of the core at said other end of the mold forming a socket in the end of the core to receive said guide part, the plate projecting radially beyond the core to connect with the mold and having an y opening in the projecting part to admit material into .the mold, and a memberfor Y mounting the mold on a rotating deviceadapted to be attachedto the mold and close said opening in the plate.

In Witness that I claim the foregoing I have hereunto subscribed my name this 29th day of November, 1929.

WESTERN UNDERWOOD. 

